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Finding the Fourth Proportional to 171.50, 236.70 and 116.15

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Solution

The fourth proportional to 171.50, 236.70 and 116.15 is: 160.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    171.50 : 236.70 = 116.15 : x
  2. Step 2: Convert to fraction form
    171.50/236.70 = 116.15/x
  3. Step 3: Cross multiply
    171.50x = 236.70 × 116.15
  4. Step 4: Simplify right side
    171.50x = 27,491.52
  5. Step 5: Solve for x
    x = 27,491.52/171.50
  6. Step 6: Final answer
    x = 160.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.